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16 August 2021

Pilonidal sinus disease is an inflammatory skin condition that usually occurs in the midline of the natal cleft (although there have been few reported cases involving other parts of the body, such as on the scalp, axilla, groin, and between the fingers). The term 'pilonidal' originates from the Latin words 'pilo' (hair) and 'nidus' (nest), implying a nest of hair. Pilonidal sinus may be asymptomatic, or present as an acute abscess (with or without cellulitis) or a chronic cyst and/or sinus with persistent drainage and/or extensive subcutaneous tracts.

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